Optical Properties of Star-Shaped Gold Nanoparticles

by Colleen L. Nehl, Hongwei Liao, & Jason H. Hafner Nano Letters, 28 Mar 2006 (web release) Here we report the synthesis, structure, and optical properties of ca. 100 nm star-shaped gold nanoparticles. Single particle spectroscopy measurements revealed that these nanoparticles have multiple plasmon resonances resulting in polarization-dependent scattering with multiple spectral peaks, which correspond to the different tips on the star-shaped structure. The plasmon resonances were also found to be extremely sensitive to the local dielectric environment. Read more